Andeew campbell



(No Model.) A. CAMPBELL.

SLIDING BEARER POR. BEDS OP PRINTING PRESSES.

Patented Oct. 123, 1883.

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mph". wwnugcm D CA UNITED STATES YPATENT OFFICE.

ANDREW CAMPBELL, OF BROOKLYN, ASSIGNOR TO JOHN MCLOUGLIN AND EDMUND MCLOUGHLIN, OF NEW YORK', N. Y.

SLlDlNG BEARER FOR BEDS OF PRINTING-PRESSES.

SPECIFICATION forming part of Letters Patent No. 286,997, dated October 23, 1883.- i Application tiled January 19, 1883. (No model.)

To @ZZ `whom, it may concern.-

Be it known that I, ANDREW CAMPBELL, a resident of Brooklyn, yin the county of Kings and State of New York, have invented certain Improvements in Sliding Bearers for the Beds of Printing-Presses, of which the following is a specification. n The reciprocating beds of cylinder printing-presses are commonly provided with two runners extending longitudinally beneath them, which slide on ways formed on thev fixed frame-work of the press. To decrease the friction between these ways and the sliding runners anti-friction rollers have been interposed between them, and these have been variously arranged and guided. y

The obj ect of my present invention is to provide a means of constructing anti-friction roller-bearers which shall not be subject to certain'defects which areinherent in the construction heretofore employed. A

Figure l of the accompanying drawings is a transverse section of a portion ofthe bed of a press with its supporting frame-work., showing my improved anti-friction bearers in transverse section. Fig. 2 is a fragmentary longitudinal section of one of the bearers cut in the plane of the line 2 2 in Fig. l. Fig. 3 is a similar section, on a larger scale, cut in the plane of the line 3 3 in Fig. 1, and looking in the direction of the arrow. Fig. 4 is a plan of a fragment of the roller-frame and rollers remov-ed. Fig. 5 is a transverse section illustrating a modification, and Fig. 6 is a sectional Aplan thereof, each of these sections being out in the plane of the like-numbered line in the other. t

Let B designate the reciprocating bed of the press, A a transverse frame extending across from one side frame to the other, (these side frames not being here showin) andBR two longitudinal girders supported on the frame A and at intervals, or otherlike transverse frames. For a more complete illustration of these several parts, and of their connection with the remaining frame-work and mechanism of the lower part of the press, reference may be made to my applicationr No. 70,171, for patent on variable bed motions for printing presses, led August 24, 1882, wherein the parts above referred to are designated by the same letters of reference herein applied to them.

rlhe girders G G are of I shape, except that their upper flanges are extended laterally and then upwardly, so as to form a trough or deep groove, on the top of each girder. The fianges forming the side walls of this trough are lettered b b. Inside the trough are placed the anti-friction rollers ofc, which roll on its bottom, and are connected together and kept at proper distances apart by a frame, O, consisting of two side bars, dd, pierced with holes at intervals, to receive the reduced ends of cross-spindles e c, which pass through axial holes in thc rollers. These spindles may fit the rollers loosely, and their ends may be riveted to the bars d d, as shown in Fig. 4, in which case the spindles are non-rotative and the rollers turn on them; or the spindles may fit the rollers tightly and rotate with them, their reduced end or journals turning in the holes in the bars d d. At each -end of the frame C the bars d d are fastened together by means of a cross-bar, f, to which they are riveted.

It will be observed by reference to-Fig. 1 that the walls b b are turned toward each other at the top, presenting approaching faces g g; or, in other words, that their inner sides below these faces are hollowed out or out away, to leave free spaces for the movement of the bars d d. These faces g g are planed true and smooth, and extend from slightly below the tops of the rollers c c to a short distance above them. The runners h h, which are shown in Fig. l as forming part of a rect-angular frame,

H, bolted to the under side of the bed B, fit in between these faces g g and rest directly on the rollers c c. Their side edges are planed to fit closely between the faces, and in their longitudinal movement they slide past and between them, and are thereby guided laterally. As there is no side thrust tending to force them against the faces, this sliding contact develops but little friction. The rollers are guided relatively to eachother by the frame O, as already described, and are prevented from becoming displaced laterally by their upper portions rittingloosely between the faces gg, as best shown in Fig. 3. As they roll a sufficient portion of IOO their ends is in contact with the faces g g, to

keep them from moving laterally and from becoming tilted or assuming an inclined position.

The frame C does not touch any portion of the trough a.

A modified construction is shown in Figs. 5 and 6. The tops of the walls b b are not turned toward each other to form faces g g, but are continued straight up, and the runner h is 1c made wider, so as to fit between the walls and be guided by them, as before described. The rollers c e are guided, not by direct contact with the walls, but through the medium of the frame C, the bars d d of which have projections i i at intervals, which slideY against the walls b b. The inner surfaces of these walls are planed down to below the bars d d. The rollers are here shown as being turned in one piece with their journals c c.

2o The distinguishing features of my invention arethat the runners 7L h are laterally guided by direct contact with the fixed walls b b, and the rollers c c and their frame C are used only to transmit the weight from the runners to the fixed trough or way, according to the best method heretofore in use, which is illustrated incidentally in my before-mentioned application. The frame C is made strong and heavy,

its side bars ft closely between the walls b b and extend vertically above the tops of the rollers, and the runner h fits between them.

This frame should travel, as the rollers will naturally do, at half the speed of the bed;

but in practice it has been found that if the friction between its sides and the runner is greater than 'that between its sides and the fixed trough it will travel faster than half the speed of the bed, and its end will strike the end of the trough, and on its return movement its other end will strike the opposite end of the trough. This not only jars the machine, but while the bed is completing its movement the runners have to slide across the rollers, thus wearing flat places on them. On

45 the other hand, if the friction between the frame and the trough is thegreater, the frame will not travel far enough, the runner being forced to slide or creep 7 on the rollers. To avoid these objections, rack-andpinion gear- 5o ing has been added, as shown in said patent, to

` drive the frame positively the proper distance; but this complicates the device, increases the cost, and adds to the friction. My present construction avoids this result by bringing the 5 5 runners into direct contact with the fixed parts that guide them laterally, so that no amount of friction between these parts can effect the speed ofthe rollers or the extent of their travel. The rollers and their frame are thus left free 6o to move at the speed which they naturally assume, and no gearing is necessary to compel them to move correctly. Another advantage of my invention is its greater cheapness. The frame C in my preferred construction may be put in rough, as it has not to fit anything eX- 6 5 cept the spindles e e, and the trough a has to be planed only on its bottom and on the faces rj g. The only parts to be planed to fit each other 4are the edges of the runners and the faces g g,- but in the former construction the 7o frame C and trough a have to be planed to a sliding fit with each other, and the runners 7L and frame C have also to be made to fit.

In place of using the walls b b for lateral lguides to the runners h 11 any other fixed part 75 may be so used, and the rollers c c may be connected together and guided in any suitable manner, or they may be unprovided with any connection with each other, without departing from the essential features of my invention.

W'hat I claim as new, and desire to secure by Letters Patent, is-

l. The combination, in a printing-press, of the bed, the runners arranged von its under side, the fixed ways or bearers extending longi- 8 5 tudinally beneath said runners, a series of anti-friction rollers interposed between each of said runners and ways, `and fixed guides bearing directly against the said runners and adapted to guide the bed against lateral displacement while itis performing its longitudinal reciprocation, substantially as and for the purposes set forth.

2. The combination of bed B, having runners hy h, with fixed girders G G, two series of 9 5 anti-friction rollers, c c, fra-mes C C, each connecting together the rollers of one series, walls b b on each of said girders, extending upward, turned toward each other, and terminatingin opposite faces, g g, said faces embracing be- Ioo tween them the runner 7L and the upper parts of the ends of the rollers, whereby said runner and rollers are guided laterally, substantially as set forth.

3. The combination of 4bcd B, runners 7L h, 105 girders G G, anti-friction rollers c c, interposed between each of said runners and girders, frame C, connecting said rollers together, and arranged out of contact with all other parts, and fixed guides or guiding-faces f/ g, embrac- I IO ing between them the runner 71 and the up. per portions of the rollers c c, substantially as set forth.

In witness whereof I -have hereunto signed my naine in the presence of two subscribing I 15 witnesses.

ANDREWT CAMPBELL. IVituesscs:

A. R. HILLYER, D. E. FARRELL. 

